It is known that in contrast to homogeneous ferromagnetism, helical magnetism is compatible with superconductivity and has only a weak suppressive effect on superconducting critical temperature. Despite this fact, it induces $p$-wave triplet superconducting correlations in homogeneous superconducting systems with intrinsic helical magnetism. The combination of these two facts indicates a high potential for the application of such systems in dissipationless spintronics. For this reason, we investigate the proximity effect in atomically thin superconductor/helical (conical) magnet heterostructures (SC/HM). It is shown that in SC/HM heterostructures, the strength of the proximity effect and, in particular, the amplitude of $p$-wave triplet superconductivity and the degree of superconductivity suppression are complex functions of the magnet exchange field and filling factors of the magnet and the superconductor. Furthermore, we demonstrate that $p$-wave correlations ensure transport spin supercurrent flow in the SC/HM heterostructure with conical magnets, and we unveil the physical relationship between the transport spin supercurrent, the degree of magnet conicity, and the internal structure of $p$-wave correlations in momentum space.

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• Magnetic texture
• Proximity effect
• Spin-singlet pairing
• Spin-triplet pairing
• Superconductivity
• Helimagnets
• Interfaces
• Low-temperature superconductors
• Tight-binding model